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<center><h2>Sources of Equilibrium Constants</h2></center>

<p>You may get information on sources of equilibrium constants by searching the WWW.
The following list contains some sites that, hopefully, may be helpful.
Some of these sites offer free downloadable software which include databases
with equilibrium constants.</p>
<ul>
<li>USGS geochemical software:&nbsp; <a class="www" target="_blank" href="http://water.usgs.gov/software/lists/geochemical">water.usgs.gov</a>&nbsp;/ <a class="www" target="_blank" href="http://wwwbrr.cr.usgs.gov/projects/GWC_coupled/phreeqc/index.html">Phreeqc</a></li>
<li>Vincent Post's Phreeqc-2:&nbsp; <a class="www" target="_blank" href="http://pfw.antipodes.nl">pfw.antipodes.nl</a></li>
<li>CTDP&nbsp; (<a class="www" target="_blank" href="http://ctdp.ensmp.fr">ctdp.ensmp.fr</a>)&nbsp; and Chess&nbsp; (<a class="www" target="_blank" href="http://chess.geosciences.ensmp.fr/">chess.geosciences.ensmp.fr/</a>)</li>
<li>JAEA:&nbsp; <a class="www" target="_blank" href="http://migrationdb.jaea.go.jp/english.html">migrationdb.jaea.go.jp</a></li>
<li>NAGRA-PSI:&nbsp; <a class="www" target="_blank" href="http://les.web.psi.ch/TDBbook">les.web.psi.ch/TDBbook</a></li>
<li>MINTEQA2:&nbsp; <a class="www" target="_blank" href="http://epa.gov/ceampubl/mmedia/minteq/">epa.gov/ceampubl/mmedia/minteq</a></li>
<li>VsualMINTEQ:&nbsp; <a class="www" target="_blank" href="http://www2.lwr.kth.se/English/OurSoftware/vminteq/">www2.lwr.kth.se/English/OurSoftware/vminteq</a></li>
<li>Tables of chemical data (by Jim Plambeck, Univ. Alberta, Canada):&nbsp; <a class="www" target="_blank" href="http://www.chem.ualberta.ca/~plambeck/che/data/p0040x.htm">www.chem.ualberta.ca</a></li>
<li>IUPAC Stability Constants Database:&nbsp; <a class="www" target="_blank" href="http://www.acadsoft.co.uk/">www.acadsoft.co.uk</a></li>
<li>NIST Critical Stability Constants (SRD&nbsp;46):&nbsp; <a class="www" target="_blank" href="http://www.nist.gov/srd/dblistpcdatabases.cfm">www.nist.gov</a></li>
<li>MINEQL+ chemical equilibrium software: <a class="www" target="_blank" href="http://www.mineql.com">www.mineql.com</a></li>
<li>EQ3/6 software: <a class="www" target="_blank" href="https://ipo.llnl.gov/?q=technologies-software-browse_software">ipo.llnl.gov/technology/software</a></li>
</ul>

<p>It is also possible to obtain equilibrium constants from <a href="ChEq_Sources_Data.htm">thermodynamic <nobr>data</a>.</nobr></p>

<p><b>References</b> that contain values for equilibrium constants:
<ul>
<li>Sill&eacute;n, L.G., Martell, A.E., <i>Stability constants of metal-ion complexes</i>,
Special Publ. No.17, London: The Chemical Society, 1964</li>

<li>Sill&eacute;n, L.G., Martell, A.E.,
<i>Stability constants of metal-ion complexes, Suppl. No.1</i>, Special Publ. No.25,
London: The Chemical Society, 1971</li>

<li>Perrin, D.D., <i>Stability constants of metal-ion complexes, Part B: Organic ligands</i>,
IUPAC Chemical Data Series No.22, Pergamon Press, 1979</li>

<li>H&ouml;gfeldt, E.,
<i>Stability constants of metal-ion complexes. Part A: Inorganic ligands</i>.
IUPAC Chemical Data Series No.21. Pergamon Press, 1982</li>

<li>Charlot, G., Collumeau, A., Marchon, M.J.C.,
<i>Selected constants. Oxidation-reduction potentials of inorganic substances in aqueous solution</i>,
IUPAC, London: Butterworths, 1971</li>

<li>Anderegg, G.,
<i>Critical survey of stability constants of EDTA complexes</i>,
IUPAC Chemical Data Series&nbsp;14, Oxford: Pergamon Press, 1977</li>

<li>Bond, A.M., Hefter, G.T.,
<i>Critical survey of stability constants and related thermodynamic data of
fluoride complexes in aqueous solution</i>, IUPAC Chemical Data Series&nbsp;27,
Oxford: Pergamon Press, 1980</li>

<li>Perrin, D.D.,
<i>Ionisation constants of inorganic acids and bases in aqueous solution</i>, <nobr>2<i>nd</i></nobr> ed.,
IUPAC Chemical Data Series&nbsp;29, Oxford: Pergamon Press, 1982</li>

<li>Bard, A.J., Parsons, R., Jordan, J. (eds.)
<i>Standard Potentials in Aqueous Solution</i>, IUPAC, New York: Marcel Dekker, 1985</li>

<li>Martell, A.E., Smith, R.M., <i>Critical stability constants</i>, New York: Plenum Press</li>
<ul><li>Vol.1: <i>Amino Acids</i>, 1974</li>
<li>Vol.2: <i>Amines</i>, 1975</li>
<li>Vol.3: <i>Other Organic Ligands</i>, 1977</li>
<li>Vol.4: <i>Inorganic complexes</i>, 1976</li>
<li>Vol.5: <i>First supplement</i>, 1982</li>
<li>Vol.6: <i>Second supplement</i>, 1989</li>
</ul>

<li>Fuger, J., Khodakovsky, I.L., Sergeyeva, E.I., Medvedev, V.A., Navratil, J.D.,
<i>The chemical Thermodynamics of Actinide Elements and Compounds:
Part&nbsp;12. The Actinide Aqueous Inorganic Complexes</i>, Vienna: IAEA, 1992</li>

<li>Grenthe, I., Fuger, J., Konings, R.J.M., Lemire, R.J., Muller, A.B., Nguyen-Trung, C.,
Wanner, H., <i>Chemical thermodynamics of uranium</i> (Wanner, H., Forest, I., eds.),
OECD-NEA, Amsterdam: Elsevier Science Publishers B.V., 1992</li>

<li>Silva, R.J., Bidoglio, G., Rand, M.H., Robouch, P.B., Wanner, H., Puigdomenech, I.,
<i>Chemical thermodynamics of americium</i>, OECD-NEA, Amsterdam: Elsevier Science Publishers, 1995</li>

<li>Nordstrom, D.K., Plummer, L.N., Langmuir, D., Busenberg, E., May, H.M., Jones, B.F., Parkhurst, D.L.,
Revised chemical equilibrium data for major water-mineral reactions and their limitations,
in: <i>Chemical modeling of aqueous systems&nbsp;II</i>
(Melchior, D.C., Basett, R.L., eds.), A.C.S. Symp. Ser. No.416,
Washington, D.C.: Amer. Chem. Soc., 1990, pp.398-413</li>

<li>Morel, F.M.M., Hering, J.G.,
<i>Principles and applications of aquatic chemistry</i>, New York: John Wiley &amp; Sons, 1993</li>

<li>Stumm, W., Morgan, J.J., <i>Aquatic Chemistry</i>, <nobr>3<i>rd</i></nobr> ed.,
New York: John Wiley &amp; Sons, 1996</li>

</ul>
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